(19)
(11) EP 1 102 433 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.01.2004 Bulletin 2004/02

(43) Date of publication A2:
23.05.2001 Bulletin 2001/21

(21) Application number: 00310099.7

(22) Date of filing: 14.11.2000
(51) International Patent Classification (IPC)7: H04L 12/26, H04L 12/24
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 19.11.1999 US 444344

(71) Applicant: Nortel Networks Limited
St. Laurent, Quebec H4S 2A9 (CA)

(72) Inventors:
  • Sundaram, Shobana
    Arlington Heights, IL 60004 (US)
  • Liu, Jingdong
    Kanata, Ontario K2T 1G1 (CA)

(74) Representative: Mackenzie, Andrew Bryan et al
Sommerville & Rushton, 45 Grosvenor Road
St Albans, Herts. AL1 3AW
St Albans, Herts. AL1 3AW (GB)

   


(54) Method and device for fault monitoring


(57) A method, system and apparatus enables carrier-grade network fault monitoring in an unreliable network transport environment. An element management system (6) is adapted to formulate and send notifications through the unreliable network transport environment, each notification having an unique transmitted notification serial number (TxNSN). A network management system (12) is operatively connected for bi-directional communication with the element management system. The network management system includes a detection mechanism responsive to notifications received from the element management system to detect a missing notification on the basis of the respective TxNSNs of received notifications; and a polling mechanism responsive to detection of a missing notification to send a polling request to the element management system for transmission of a response containing data related to the missing notification. The advantage is simple, easily managed, carrier-grade network fault monitoring without overloading the unreliable network transport.






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